public class Example2_4 {
  public static void main(String args[]) {
     int a[] = {1,2,3,4};
     int b[] = {100,200,300};
     System.out.println("数组a的元素个数="+a.length);
     System.out.println("数组b的元素个数="+b.length);
     System.out.println("数组a的引用="+a);
     System.out.println("数组b的引用="+b);
     a = b;
     System.out.println("数组a的元素个数="+a.length);
     System.out.println("数组b的元素个数="+b.length);
     System.out.println("a[0]="+a[0]+",a[1]="+a[1]+",a[2]="+a[2]);
     System.out.println("b[0]="+b[0]+",b[1]="+b[1]+",b[2]="+b[2]);
     }
}
